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Merck (NYSE: MRK) EVP exercises RSUs with tax-withholding share disposition

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Merck & Co., Inc. executive David Michael Williams reported routine equity compensation activity involving restricted stock units and related tax withholding. He exercised 1,377 restricted stock units into the same number of common shares at a stated value of $110.03 per share and 679 common shares were disposed of to cover tax obligations.

Following these transactions, he directly held 31,716.037 shares of Merck common stock. He also held 2,755 restricted stock units, each representing a contingent right to receive one Merck common share, which are scheduled to vest and be distributed in three equal installments on April 29, 2026, April 29, 2027 and April 29, 2028. Holdings include shares acquired through dividend reinvestment.

Positive

  • None.

Negative

  • None.
Insider Williams David Michael
Role EVP,Chief Info&Digital Officer
Type Security Shares Price Value
Exercise Restricted Stock Unit 1,377 $0.00 --
Exercise Common Stock 1,377 $110.03 $152K
Tax Withholding Common Stock 679 $110.03 $75K
Holdings After Transaction: Restricted Stock Unit — 2,755 shares (Direct, null); Common Stock — 32,395.037 shares (Direct, null)
Footnotes (1)
  1. Holdings include shares acquired in dividend reinvestment transactions. Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 4/29/2026, 4/29/2027 and 4/29/2028.
RSUs exercised 1,377 shares Restricted stock units converted to Merck common stock on April 29, 2026
Tax-withholding shares 679 shares Common shares disposed to cover tax obligations at $110.03 per share
Common shares held 31,716.037 shares Direct Merck common stock holdings after reported transactions
RSUs outstanding 2,755 units Restricted stock units remaining after the exercise, each for one common share
Referenced share price $110.03 per share Price used for both RSU exercise and tax-withholding disposition
Restricted Stock Unit financial
"security_title: "Restricted Stock Unit" and footnote defining each unit as a contingent right"
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
tax-withholding disposition financial
"transaction_action: "tax-withholding disposition" for the 679-share transaction coded F"
A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.
derivative exercise/conversion financial
"transaction_action: "derivative exercise/conversion" for transactions coded M"
dividend reinvestment transactions financial
"footnote: "Holdings include shares acquired in dividend reinvestment transactions.""
derivative security financial
"transaction_code_description: "Exercise or conversion of derivative security""
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Williams David Michael

(Last)(First)(Middle)
MERCK & CO., INC.
126 EAST LINCOLN AVENUE

(Street)
RAHWAY NEW JERSEY 07065

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Merck & Co., Inc. [ MRK ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
EVP,Chief Info&Digital Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/29/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock04/29/2026M1,377A$110.0332,395.037(1)D
Common Stock04/29/2026F679D$110.0331,716.037D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Unit(2)04/29/2026M1,37704/29/2026(3)04/29/2028Common Stock1,377$02,755D
Explanation of Responses:
1. Holdings include shares acquired in dividend reinvestment transactions.
2. Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.
3. These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 4/29/2026, 4/29/2027 and 4/29/2028.
/s/ Kelly E. W. Grez as Attorney-in-Fact for David Michael Williams05/01/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did Merck (MRK) EVP David Michael Williams report?

David Michael Williams reported exercising 1,377 restricted stock units into Merck common shares and a related tax-withholding disposition of 679 common shares, all dated 29 April 2026, as part of routine equity compensation activity rather than open-market buying or selling.

How many Merck (MRK) shares does David Michael Williams hold after this Form 4?

After these transactions, David Michael Williams directly holds 31,716.037 Merck common shares. This figure reflects the net result of the restricted stock unit exercise and related tax-withholding disposition, plus prior holdings, including shares previously acquired through dividend reinvestment transactions.

What restricted stock unit (RSU) position does the Merck (MRK) EVP retain?

He retains 2,755 restricted stock units, each representing a contingent right to receive one Merck common share. These RSUs are scheduled to vest and be distributed in three equal installments on April 29, 2026, April 29, 2027, and April 29, 2028, subject to applicable conditions.

How was tax handled in David Michael Williams’s Merck (MRK) equity transaction?

The filing shows a tax-withholding disposition of 679 Merck common shares, coded “F,” valued at $110.03 per share. This indicates shares were withheld or delivered to satisfy tax obligations tied to the restricted stock unit exercise, not an open-market sale decision.

At what price were the Merck (MRK) shares valued in the reported Form 4 transactions?

Both the restricted stock unit exercise and the related tax-withholding disposition reference a price of $110.03 per Merck common share. This price is used in the Form 4 to quantify the value of the equity compensation and the corresponding tax-withholding share disposition.